Fuel Cock; Reed Valve - Yamaha CW50L Service Manual

I [ ] FUELCOCK/ CARB I
FUELCOCK/ CARB
D-15
REED VALVE REED VALVE
FUEL COCK iNSPECTiON
1. Check:
INSPECTION • Carburetor joint
1. Stop the engine, Damage/Cracks _ Replace.
• Reed valve
2. Remove: Wear/Cracks/Damage-._ Replace.
Refer to "COVERS" in CHAPTER 3. Reed valve inspection steps:
Visually inspect the reed valve.
NOTE:
3. Check: A reed valve in good condition should be corn-
• Fuel cock pletely or at least nearly flush with the valve seat.
Fuel cock inspection steps: If in doubt, apply suction to the carburetor
• Disconnect the fuel hose (_. side of the assembly.
Place a receptacle under the fuel hose end. Leakage should be minimal to moderate.
If fuel stops flowing within a few seconds, the ......................... ******************* ....... ***
fuel cock is in good condition. If not clean or
replace the fuel cock.
Disconnect the vacuum hose and breathe in
__ _r'_ \ _"_r--':'_ through the hose to create a vacuum in the I 2. Measure:
• Valve stopper height C)
fuel cock. _ Out of specification _ Replace valve stop-
. If fuel flows out of the fuel hose when vacuum
is applied and stops flowing when vacuum _ per.
stops, the fuel cock is in good condition. " _/'_ I
• If not, clean or replace the vacuum hose, the rJ L} F_"_I valve stopper height:
I
fuel hose and the fuel cock. _ 4.0 - 4.4 mm (0.157 - 0.173 in)
322_3
REED VALVE
3. Measure:
• Reed valve clearance (_)
REMOVAL Out of specification --* Replace reed valve.
• emove
• Side covers Reed valve clearance:
Refer to "COVERS" in CHAPTER 3. (.j Less than 0.2 mm (0.008 in)
2. Remove:
• Carburetor
Refer to section "CARBURETOR REMOVAL". 3_o2,
_(_: ___) 3. Remove:
• Carburetor joint
• Reed valve assembly
3_Z20"22
5-7 5-8